hscolour is a small Haskell script to colourise Haskell code.
It currently has six output formats:

 - ANSI terminal codes,
 - HTML 3.2 with <font> tags,
 - HTML 4.01 with CSS,
 - XHTML 1.0 with inline CSS styling,
 - LaTeX,
 - and mIRC chat codes.

WWW: http://code.haskell.org/~malcolm/hscolour/